Method for breeding giant salamanders

Abstract

The invention discloses a method for breeding giant salamanders. The method comprises the following steps that S1, in about middle ten days of August every year, the giant salamanders are classified according to different conditions of sexual maturity and males and females of the giant salamanders and then placed separately; S2, after the female giant salamanders enter the rut, the female giant salamanders with the weight of 1.5-3.5 KG and 4-5 years old are selected; S3, the female giant salamanders are observed, when it is discovered that the bodies of the female giant salamanders become red,a nest for laying eggs is built for the female giant salamanders, and a slope is arranged in the nest; S4, water is added on the nest for laying eggs, the water flows from left to right, and after the female giant salamanders are adapted to the nest for a certain period of time, a male giant salamander larger than the female giant salamanders in size is placed in the nest; S5, the female giant salamanders and the male giant salamander can respond quickly. According to the method, the problem of low survival rate of fertilized ova is solved, and meanwhile the problem is also solved that hormones need to be injected during breeding; the situation is avoided that due to hormone injection, the service life of the giant salamanders is shortened, the breeding number of the giant salamanders isgreatly increased, the breeding quality of the giant salamanders is greatly improved, and the method is simple and convenient to use.

Description

technical field [0001] The invention relates to the technical field of giant salamander breeding, in particular to a method for breeding giant salamander. Background technique [0002] Giant salamander, also known as giant salamander, is an amphibian belonging to the family Cryptobranchidae. It is mainly distributed in the Yangtze River, the Yellow River and the Pearl River basin. It can reach 1 meter or more, and the heaviest can exceed 100 catties, and its shape is somewhat similar to a lizard, but it is fatter and flatter in comparison. Recently, scientists have studied that giant salamanders breathe with gills when they are young, and breathe with lungs when they grow up. Giant salamanders inhabit mountain streams, and live in caves with clear water, low sand content, turbulent water flow, and return water. Chinese giant salamanders are distributed in other provinces and regions except Xinjiang, Tibet, Inner Mongolia, and Taiwan. They are mainly produced in the mountai...

AI Technical Summary

Problems solved by technology

The patent of CN1336109A discloses the artificial breeding method of giant salamander, by putting male and female salamander in the breeding pond to carry out ovulation and fertilization, the reproduction of salamander has been realized, but, after the ovulation and fertilization of this method, the female fish is not captured in time, and the male and female fish will be separated. The phenomenon of cannibalism occurs, and eggs will be used to satisfy hunger, which greatly reduces the reproductive number of salamanders and cannot achieve the desired effect

[0004] The patent of CN1353927A discloses the method of artificial reproduction of giant salamander. Carp head and unique method are used to artificially induce labor and insemination to improve the gonad maturation rate of giant salamander, and then improve the fertilization rate and hatching rate. However, this method is troublesome. Hormone injections are required during induced labor and artificial insemination. When injecting salamanders, it is easy to injure the salamanders, which in turn will shorten the lifespan of the salamanders, thus affecting the reproduction of the salamanders.

[0005] The patent of CN103918602A discloses a high-efficiency artificial breeding technology of giant salamander, which combines artificial reproduction and wild reproduction, solves the problem of poor development of artificial reproduction and asynchronous wild breeding male and female fish, and improves the reproductive efficiency and quality of giant salamander , but this method cannot increase the reproductive number of giant salamanders, and cannot supplement unfertilized eggs, so that the number of giant salamanders is small when they reproduce